To make the mineral portion of human and animals bones and teeth, calcium must be combined with phospate to form hydroxlapaptite. Calcium oxide or lime is used in lots of chemical refinery processes and thats made up from heating and adding water to limestone. When sand is mixed with lime, it hardens and turns into plaster. To make portland cement, lime is mixed with other compounds.
To make the mineral portion of human and animals bones and teeth, calcium must be combined with phospate to form hydroxlapaptite. Calcium oxide or lime is used in lots of chemical refinery processes and thats made up from heating and adding water to limestone. When sand is mixed with lime, it hardens and turns into plaster. To make portland cement, lime is mixed with other compounds.